2311012155 has 16 divisors (see below), whose sum is σ = 3730344480. Its totient is φ = 1221631488.

The previous prime is 2311012153. The next prime is 2311012169. The reversal of 2311012155 is 5512101132.

It is not a de Polignac number, because 2311012155 - 2¹ = 2311012153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2311012153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680020 + ... + 683409.

It is an arithmetic number, because the mean of its divisors is an integer number (233146530).

Almost surely, 2^2311012155 is an apocalyptic number.

2311012155 is a deficient number, since it is larger than the sum of its proper divisors (1419332325).

2311012155 is a wasteful number, since it uses less digits than its factorization.

2311012155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363550.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 2311012155 is about 48072.9877894021. The cubic root of 2311012155 is about 1322.1094514202.

Adding to 2311012155 its reverse (5512101132), we get a palindrome (7823113287).

The spelling of 2311012155 in words is "two billion, three hundred eleven million, twelve thousand, one hundred fifty-five".